KNSB FIDE
JM

Joost Mostert

Rated since January 2023

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
BOLWERK, P.F.T. (PETER) 2176
6554 KNSB competitie 2022-2023 Klasse 2 ronde 6 · Saturday 11 February 2023
ROEBERS, J.S. (JAN) (FM) 2150
11019 KNSB competitie 2024-2025 Klasse 2 ronde 8 · Saturday 5 April 2025
VERMEER, M. (MARK) 2090
11991 KNSB competitie 2025-2026 Klasse 2 ronde 2 · Saturday 4 October 2025
DIJKEN VAN, R.B. (REX) 2068
7638 KNSB competitie 2023-2024 Klasse 2 ronde 2 · Saturday 7 October 2023
PIJPERS, P.J. (PETER) 2047
7014 KNSB competitie 2022-2023 Klasse 2 ronde 9 · Saturday 22 April 2023
Worst losses
VALSTAR, J.M. (JASPER) 1810
6795 82e Noteboomtoernooi Groep B · Saturday 25 February 2023
HELM VAN DER, T. (TOM) 1813
12439 HSB competitie 2025-2026 November comp · Monday 10 November 2025
SMEETS, W. (WOUTER) 1827
7352 15e BPB Limburg Open 2023 Groep B · Friday 26 May 2023
GRAMMATICO, S. (SERGIO) 1837
12763 HSB competitie 2025-2026 DecemberJanuari HK Beker 2526 · Tuesday 25 November 2025
WALKER, JULIA 1856
9031 16e BPB Limburg Open 2024 Groep B · Monday 20 May 2024
85e Daniel Noteboomtoernooi Groep B Friday 20 February 2026 +1–1=4 +2.1
2026 Chess.com Botwinnik Open Groep B Friday 2 January 2026 +2–2=2 +7.3
17e BPB Limburg Open 2025 Groep B Friday 6 June 2025 +2–1=4 +11.3
16e BPB Limburg Open 2024 Groep B Friday 17 May 2024 +1–3=3 -30.5
15e BPB Limburg Open 2023 Groep B Friday 26 May 2023 +3–2=2 +9.7
KNSB competitie 2025-2026 Klasse 2 ronde 9 Saturday 20 September 2025 +0–1=0 -4.4
KNSB competitie 2025-2026 Klasse 2 ronde 8 Saturday 20 September 2025 +0–2=0 -11.2
KNSB competitie 2025-2026 Klasse 2 ronde 7 Saturday 20 September 2025 +0–0=1 +10.4
KNSB competitie 2025-2026 Klasse 2 ronde 5 Saturday 20 September 2025 +0–1=0 -8.9
KNSB competitie 2025-2026 Klasse 2 Ronde 4 Saturday 20 September 2025 +0–1=0 -5.2
KNSB competitie 2025-2026 Klasse 2 ronde 2 Saturday 20 September 2025 +1–0=0 +18.4
KNSB competitie 2025-2026 Klasse 2 ronde 1 Saturday 20 September 2025 +0–0=1 +8.0
HSB competitie 2025-2026 April2026 Monday 1 September 2025 +1–0=0 +10.8
HSB competitie 2025-2026 CompMrt2026 Monday 1 September 2025 +2–0=0 +19.7
HSB competitie 2025-2026 HSBCompetitieFeb26 Monday 1 September 2025 +0–0=1 +3.0
HSB competitie 2025-2026 DecemberJanuari Comp 2526 Monday 1 September 2025 +0–0=1 -2.6
HSB competitie 2025-2026 DecemberJanuari HK Beker 2526 Monday 1 September 2025 +0–1=0 -15.2
HSB competitie 2025-2026 November comp Monday 1 September 2025 +0–1=0 -16.0
HSB competitie 2025-2026 November beker H Monday 1 September 2025 +0–1=0 -10.8
HSB competitie 2025-2026 October 2025 Monday 1 September 2025 +0–1=0 -13.3
HSB competitie 2025-2026 September 2025 Monday 1 September 2025 +0–1=0 -5.6
KNSB competitie 2024-2025 Klasse 2 ronde 9 Saturday 21 September 2024 +0–1=0 -5.3
KNSB competitie 2024-2025 Klasse 2 ronde 8 Saturday 21 September 2024 +1–0=0 +20.4
KNSB competitie 2024-2025 Klasse 2 ronde 7 Saturday 21 September 2024 +0–0=1 +7.1
KNSB competitie 2024-2025 Klasse 4 ronde 6 Saturday 21 September 2024 +1–0=0 +16.2
KNSB competitie 2024-2025 Klasse 4 ronde 4 Saturday 21 September 2024 +0–0=1 +6.3
KNSB competitie 2024-2025 Klasse 4 ronde 3 Saturday 21 September 2024 +0–0=1 +8.6
KNSB competitie 2024-2025 Klasse 4 ronde 2 Saturday 21 September 2024 +0–1=0 -8.2
KNSB competitie 2024-2025 Klasse 2 ronde 1 Saturday 21 September 2024 +0–1=0 -11.5
HSB competitie 2024-2025 Comp april Sunday 1 September 2024 +0–1=0 -12.0
HSB competitie 2024-2025 CompNovember2024 Sunday 1 September 2024 +0–1=0 -3.8
HSB competitie 2024-2025 Groep A Sunday 1 September 2024 +0–1=1 -13.9
83e Noteboomtoernooi Groep B Friday 16 February 2024 +2–1=3 -22.3
HSB competitie 2023-2024 Competitie april Monday 18 September 2023 +0–1=0 -5.2
HSB competitie 2023-2024 HSB Competitie 2023-2024 Januari en Februari Monday 18 September 2023 +0–1=0 -14.8
HSB competitie 2023-2024 December 2023 Monday 18 September 2023 +1–0=0 +2.3
HSB competitie 2023-2024 Beker ronde 1 deel 1 Monday 18 September 2023 +0–1=0
HSB competitie 2023-2024 Hoofd en 2A ronde 3 Monday 18 September 2023 +0–0=1 +4.1
HSB competitie 2023-2024 competitie ronde Monday 18 September 2023 +0–0=1 -1.4
HSB competitie 2023-2024 Groep A Monday 18 September 2023 +0–0=1 -1.9
KNSB competitie 2023-2024 Klasse 2 ronde 9 Saturday 16 September 2023 +0–1=0 -5.5
KNSB competitie 2023-2024 Klasse 2 ronde 7 Saturday 16 September 2023 +0–1=0 -6.9
KNSB competitie 2023-2024 Klasse 2 ronde 6 Saturday 16 September 2023 +0–1=0 -6.5
KNSB competitie 2023-2024 Klasse 2 ronde 5 Saturday 16 September 2023 +1–0=0 +16.1
KNSB competitie 2023-2024 Klasse 2 ronde 4 Saturday 16 September 2023 +1–0=0 +12.5
KNSB competitie 2023-2024 Klasse 2 ronde 2 Saturday 16 September 2023 +1–0=0 +18.0
KNSB competitie 2023-2024 Klasse 2 ronde 1 Saturday 16 September 2023 +0–1=0 -8.7
82e Noteboomtoernooi Groep B Friday 24 February 2023 +3–2=1 -10.2
KNSB competitie 2022-2023 Klasse 2 ronde 9 Saturday 17 September 2022 +1–0=0 +17.6
KNSB competitie 2022-2023 Klasse 2 ronde 8 Saturday 17 September 2022 +0–1=0 -4.7
KNSB competitie 2022-2023 Klasse 2 ronde 7 Saturday 17 September 2022 +0–1=0 -8.3
KNSB competitie 2022-2023 Klasse 2 ronde 6 Saturday 17 September 2022 +1–0=0 +21.2
KNSB competitie 2022-2023 Klasse 2 ronde 5 Saturday 17 September 2022 +1–0=0 +13.3
KNSB competitie 2022-2023 Klasse 2 ronde 4 Saturday 17 September 2022 +0–1=0 -2.2
HSB competitie 2022-2023 HSB competitie 2022-2023 ronde 6 en 7 Monday 29 August 2022 +0–0=1 -7.6
HSB competitie 2022-2023 HSB competitie 2022-2023 deel 5 Monday 29 August 2022 +1–0=0 +9.6
HSB competitie 2022-2023 HSB competitie 2022-2023 deel 4 Monday 29 August 2022 +2–0=0 +7.5

Rating History

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Peak Ratings

Classic 1949 Jan. 1, 2024
Rapid 1885 May 1, 2026
Blitz 1885 May 1, 2026

Games

Wins 30
Losses 38
Draws 31
Win Rate 30%

Performance by Color

Color Wins Draws Losses Win Rate
White 15 17 17 31%
Black 15 14 21 30%

Recent Matches

Pietersma, D. (Douwe) (1836) Tuesday 21 April 2026 WIN +10.8
Pathak, R. (Raghav) (2149) Saturday 11 April 2026 LOSS -4.4
Verweij, D.Z. (David) (2097) Saturday 7 March 2026 LOSS -5.6
Verweij, D.Z. (David) (2097) Saturday 7 March 2026 LOSS -5.6
Verheijen, J. (Jan) (1804) Monday 2 March 2026 WIN +9.8
Verheijen, J. (Jan) (1804) Monday 2 March 2026 WIN +9.8
Moeri, C. (Casper) (1794) Sunday 22 February 2026 WIN +10.1
Verhoeff, T.J. (Timardi) (1889) Sunday 22 February 2026 LOSS -11.7
Elangkumaran, A. (Anumitra) (1779) Saturday 21 February 2026 DRAW -1.5
Pauw, M.R. (Martijn) (1975) Saturday 21 February 2026 DRAW +3.8
Ponomarev, I.A. (Ivan) (2007) Friday 20 February 2026 DRAW +4.8
Jiao, J. (Jonathan) (1661) Friday 20 February 2026 DRAW -3.3
Middelkoop, A. (Arno) (1952) Monday 9 February 2026 DRAW +3.0
CM Boulahfa, H. (Hicham) (2262) Saturday 7 February 2026 DRAW +10.4
Krosenbrink, M. (Marcel) (2007) Sunday 4 January 2026 LOSS -8.1
Montfort van, L. (Loe) (1812) Sunday 4 January 2026 WIN +10.3
Koppenens, O.M. (Oscar) (1966) Saturday 3 January 2026 LOSS -9.4
Kanters, C.J. (Cor) (1979) Saturday 3 January 2026 DRAW +3.6
Middelkoop, A. (Arno) (1957) Friday 2 January 2026 DRAW +2.8
Velde van de, W.J.C. (Wilco) (1744) Friday 2 January 2026 WIN +8.1